Abstract
The observational construction method is becoming increasingly important for the active supporting plan of rock slope. As a theory for the observational construction method Stochastic Block Theory has been suggested by the authors in order to calate the probability of the event which a removable block is formed by the next excavation by taking rock joint distribution into account. In this study the applicability of this theory to the actual rock slope is examined using the joint trace maps which are obtained from the actual field. As the result of the simulation, it is clarified that this theory is useful for the prediction of a removable block.
